Desired functionality

[MG A]

Hi,
        In this situation:

- A computer has several disks
- That computer has Linux installed in one of those disk 

        I want to :
- Install a Microsoft OS in that computer

        I'd like grub to do this :
- Save somehow the boot configuration, previous to the Microsoft
installation 
- Recover from the Microsoft OS installation, so that I can boot again
Linux. That is, grub can restore and recreate the boot menu, somehow,
booting from a Linux CD and executing grub, for example. 

That feature exists or is planned ? 

thanks
---
mga